Philips-MCM-205-Service-Manual电路原理图.pdf

《Philips-MCM-205-Service-Manual电路原理图.pdf》由会员分享，可在线阅读，更多相关《Philips-MCM-205-Service-Manual电路原理图.pdf（28页珍藏版）》请在收音机爱好者资料库上搜索。

1、 MCM205/12Copyright 2009 Philips Consumer Electronics B.V. Eindhoven, The NetherlandsAll rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise without the prior perm

2、ission of Philips.Published by SL 0914 Service Audio Printed in The Netherlands Subject to modificationMicro SystemVersion 1.2CLASS 1LASER PRODUCT 3141 785 33912TABLE OF CONTENTSPageLocation of PCBs .1-2Specifi cations .1-3Measurement Setup .1-4Service Aids, Safety Instruction, etc .1-5CD Playabilit

3、y Check .1-6 to 1-7Software Version Checking . 2Set Wiring MW: 531 - 1602kHzTuning grid 50 kHz (FM); 9 kHz (MW)Total Harmonic Distortion50 dB1-31-4LEVEL METERe.g. Sennheiser UPM550with FF-filterS/N and distortion metere.g. Sound Technology ST1700BLRDUTCDUse Audio Signal Disc (replaces test disc 3)SB

4、C429 4822 397 30184Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTS/N and distortion metere.g. Sound Technology ST1700BFrame aeriale.g. 7122 707 89001Tuner AM (MW,LW)To avoid atmospheric interference all AM-measurements have to be carried out in a Faradays cage.Use a bandpass filter

5、 (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).RF Generator e.g. PM5326Ri=50Bandpass250Hz-15kHze.g. 7122 707 48001LF Voltmetere.g. PM2534DUTRF Generator e.g. PM5326S/N and distortion metere.g. Sound Technology ST1700BUse a bandpass filter to eliminate hum (50Hz, 100Hz) a

6、nd disturbance from the pilottone (19kHz, 38kHz).Ri=50Tuner FMMEASUREMENT SETUP1-5SERVICE AIDSGB WARNINGAll ICs and many other semi-conductors aresusceptible to electrostatic discharges (ESD).Careless handling during repair can reduce lifedrastically.When repairing, make sure thatyouareconnected wit

7、h the same potential as the massof the set viaawrist wrap with resistance.Keep components and tools also at thispotential.ESDCLASS 1LASER PRODUCTGBSafety regulations require that the set be restored to its originalcondition and that parts which are identical with those specified,be usedSafety compon

8、ents are marked by the symbol!.Lead freeSet remains closed!NYPlay a CD for at least 10 minutesYplayabilityok ?Nplayabilityok ?add Info for customer“SET OK“check playabilityNYplayabilityok ?check playabilitycheck playabilityreturn setCustomer complaint“CD related problem“fast“ lens cleaningFor flap l

9、oaders (= access to CD drive possible)cleaning method is recommendedINSTRUCTIONS ON CD PLAYABILITY1 - 6Exchange CDM- For description - see following pagesPLAYABILITY CHECKFor sets which are compatible with CD-RW discsuse CD-RW Printed Audio Disc.7104 099 96611TR 3 (Fingerprint)TR 8 (600 Black dot) m

10、aximum at 01:00 playback of these two tracks without audible disturbanceplaying time for: Fingerprint 10secondsBlack dot from 00:50 to 01:10 jump forward/backward (search) within a reasonable timeFor all other sets use CD-DA SBC 444A.4822 397 30245TR 14 (600 Black dot) maximum at 01:15TR 19 (Fingerp

11、rint)TR 10 (1000 wedge) playback of all these tracks without audible disturbanceplaying time for: 1000 wedge 10secondsFingerprint 10secondsBlack dot from 01:05 to 01:25 jump forward/backward (search) within a reasonable timeCUSTOMER INFORMATIONIt is proposed to add an addendum sheet to the set which

12、informs the customer that the set has been checkedcarefully - but no fault was found.The problem was obviously caused by a scratched, dirty orcopy-protected CD. In case problems remain, the customeris requested to contact the workshop directly. The lens cleaning (method ) should be mentioned in thea

13、ddendum sheet.The final wording in national language as well as the printingis under responsibility of the Regional Service Organizations.LIQUID LENS CLEANINGBecause the material of the lens is synthetic and coatedwith a special anti-reflectivity layer, cleaning must be donewith a non-aggressive cle

14、aning fluid. It is advised to use“Cleaning Solvent The actuator is a very precise mechanical component andmay not be damaged in order to guarantee its full function.Clean the lens gently (dont press too hard) with a soft andclean cotton bud moistened with the special lens cleaner.The direction of cl

15、eaning must be in the way as indicated inthe picture below.Before touching the lens it is advised to clean thesurface of the lens by blowing clean air over it.This to avoid that little particles make scratches onthe lens.INSTRUCTIONS ON CD PLAYABILITY1 - 7How to read software version, 1. Plug A/C to

16、 power on and under NO DISC status, press and hold PLAY and DBB buttons for 5 seconds, LCD Display shows existing CD software version “CD - V029“ and MCU software version “MCU - 013”. SERVICE TEST PROGRAM2-12-13-1 3-1SET BLOCK & WIRING DIAGRAMMAIN & TUNER &HEAD-PHONE BOARDTABLE OF CONTENTSMain Board Layout Top View . 5-2Main Board Layout Bottom View . 5-3Tuner Board Layout Diagram . 5-4Headphone Board Layout Diagram . 5-5Circuit Diagram . 5-64-1 4-1